American ATM-160M-N 1**
American ATM-160M-N 1** is in the DOE listing as of Oct 19, 2026. American ATM-160M-N 1** is in the ENERGY STAR list as of Oct 19, 2026.
- Gas tankless water heater
- 4 listed models
Its figures are also listed under A. O. Smith ATM-160M-N 1**.
Certified and advertised figures
- Flow at a 67°F rise
- 4.8gallons per minuteCertified
- Advertised flow
- 10.5gallons per minuteAmerican, no rise stated
- UEF
- 0.95Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
The heater gives less flow when colder incoming water needs a bigger rise.
- Cold water
- Cold water must be at least 10°F colder than the hot water setting.
- Flow estimate
- The estimate uses the lowest certified flow among the listed models. It is about 4.6 gal/min at a 70°F rise.
Flow limits
- The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
- Cold water from a well or long pipe run can differ from the temperature you enter.
- Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.
Product history
American ATM-160M-N 1** was in the DOE listing by Oct 1, 2026.
American ATM-160M-N 1** has a recorded ENERGY STAR market-availability date of May 15, 2025. It first appeared in the ENERGY STAR list between March 2025 and June 2025.
Advertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| UEF | 0.95 | 0.95 | American | Read Oct 4, 2026 |
| Flow | 10.5 gal/min, no rise stated | 4.8 gal/min at a 67°F rise | American | Read Oct 4, 2026 |
| Flow | 4.8 gal/min at a 67°F rise | 4.8 gal/min at a 67°F rise | American | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| MTM-160M-N 1** | 0.95 | 4.8 | 96% | High |
| MTM-160M-P 1*1 | 0.95 | 4.8 | 96% | High |
| MTM-160X3-N 1** | 0.95 | 4.8 | 96% | High |
| MTM-160X3-P 1*1 | 0.95 | 4.8 | 96% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
ENERGY STAR certified models
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency |
|---|---|---|---|
| MTM-160M-N 1** | 0.95 | 4.8 | 96% |
| MTM-160M-P 1*1 | 0.95 | 4.8 | 96% |
| MTM-160X3-N 1** | 0.95 | 4.8 | 96% |
| MTM-160X3-P 1*1 | 0.95 | 4.8 | 96% |
It heats 4.8 gallons per minute of water by 67°F in the test. The median gas tankless model heats 4.8 gallons per minute by 67°F. Of 487 gas tankless models, 221 have a higher flow than this one.
All 4 of its model numbers are ENERGY STAR certified. In the test, 5% of its energy does not reach the hot water (UEF 0.95). Its test simulated a day of high hot water use (its draw pattern). Among 399 gas tankless models on its draw pattern, 49 have a higher UEF. For its type and draw pattern, the median UEF is 0.93. Of the energy it spends heating water, 96% ends up in it (its recovery efficiency).
It is sold under 4 model numbers in all. All of its test figures are shared by 6 other basic models. Between them, those basic models carry 5 other brand names. You can find the whole group on the page for the A. O. Smith ATM-160M-N 1**.
It may qualify for 6 rebate programs in 7 states. Another 2 rebate programs may accept it if it meets their other terms.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify | Its own page |
| Colorado Springs Utilities Water heater rebate (gas storage, gas tankless) | CO | May qualify | Its own page |
| Nicor Gas Energy Efficiency Rebates for Your Home (gas tankless) | IL | May qualify if it meets the other terms | Its own page |
| DTE Energy Water Heaters (gas storage, gas tankless) | MI | May qualify | Its own page |
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
| PSE&G Tankless Water Heaters | NJ | May qualify | Its own page |
| Energy Trust of Oregon Residential Incentives | OR, WA | May qualify | Its own page |
| Focus on Energy (gas tankless) | WI | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every American basic model
- Every gas tankless water heater certified at 4.0 to 4.9 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Changes to an advertised figure after the date beside it.